Nassau County, New York Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Nassau County, NY Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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A+
Health Top gradeAmong the top 3 healthiest counties in New York
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A
Income Above averageWealthiest county in New York
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A+
Education Top gradeAmong the top 5 best educated counties in New York
Source: Map AI Methodology
Population: density and quick facts
| Metric | Nassau County | New York Avg | U.S. Average |
|---|---|---|---|
| Population | 1,389,398 | 19,748,855 | 337,468,954 |
| Population density (per sq mi) | 3065.9 | 362.0 | 86.4 |
| Population growth (%/yr) | 0.29% | 0.05% | 0.59% |
| Median age | 43.1 | 38.7 | 37.3 |
| Households | 457,924 | 7,694,043 | 130,235,071 |
Population in Nassau County grew by 2.5% from 2009 to 2024, reaching 1,389,398 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Nassau County is Gen X, aged 45–60, at 22.2% of residents. That is 1.4 points above New York as a whole.
- Gen Z 13–28 274,999 19.8% -0.7 pts
- Millennials 29–44 278,921 20.1% -2.1 pts
- Gen X 45–60 308,283 22.2% +1.4 pts
- Boomers 61–79 251,224 18.1% +0.7 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below New York, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 50.9% of the people living in Nassau County and men 49.1%.
- Women 50.9% New York 51.3%
- Men 49.1% New York 48.7%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Nassau County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Nassau County has a the economy index of A, which means it is very prosperous.
| Metric | Nassau County | New York Avg | U.S. Average |
|---|---|---|---|
| Median household income | $146,499 | $86,556 | $80,455 |
| Income growth (%/yr) | 4.58% | 4.51% | 4.80% |
| Unemployment rate | 4.8% | 6.4% | 5.2% |
The median household income in Nassau County is about 69% higher than in New York.
Housing
| Metric | Nassau County | New York Avg | U.S. Average |
|---|---|---|---|
| Median home price | $605,757 | $471,885 | $248,835 |
| Median rent | $2,252 | $1,621 | $1,407 |
| Homeownership rate | 82.0% | 54.3% | 65.2% |
The median home price in Nassau County is about 22.4 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $2,252 per month for that long.
Commute Time & Mobility
Commuters in Nassau County spend about 62 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 259 hours, about 10.8 full days, spent commuting.
| Metric | Nassau County | New York Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 31.1 | 28.7 | 22.4 |
| Round-trip commute (min) | 62.2 | 57.4 | 44.8 |
| Yearly time spent (hours) | 259 | 239 | 187 |
| Estimated yearly cost | $8,034 | $7,414 | $5,790 |
| Work from home | 15.6% | 15.0% | 15.0% |
| Highway traffic (vehicles/day) | 19,697 | 9,257 | 8,813 |
| Local road traffic (vehicles/day) | 3,316 | 1,586 | 1,355 |
Fastest commutes among counties in
New York:
Hamilton County (13.6 min), Chautauqua County (15.4 min), Franklin County (16.4 min).
Slowest:
Bronx County (43.2 min), Queens County (41.8 min), Kings County (41.6 min).
The average commute time in Nassau County is 31 minutes, longer than the 29 minutes in New York.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Nassau County has a education index of A+, which means it is exceptionally educated.
| Metric | Nassau County | New York Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 45.7% | 36.5% | 31.6% |
| Average household size | 2.99 | 2.49 | 2.53 |
Highest education index among counties in
New York:
New York County (0.5), Tompkins County (0.4), Westchester County (0.4).
Lowest:
Bronx County (0.2), Orleans County (0.2), Hamilton County (0.2).
Health
Nassau County has a health index of A+, which means it is exceptionally healthy.
| Metric | Nassau County | New York Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 82.4 | 80.3 | 78.3 |
| Self-rated poor health | 9.9% | 13.2% | 16.3% |
| Smokers | 11.1% | 17.4% | 19.0% |
Highest health index among counties in
New York:
Tompkins County (0.8), Nassau County (0.8), New York County (0.8).
Lowest:
Bronx County (0.8), Montgomery County (0.8), Cattaraugus County (0.8).
Nassau County, NY Compared With Nearby Counties
Nassau County, NY is typical in size for this group, 1,389,398 residents against a local median of 1,628,057, so the measures below are close to a like for like comparison. Where Nassau County, NY breaks from the counties next to it is median household income, sitting 69% above the local median of $86,773 at $146,499. That is the better end of the local range on this measure.
Commute tells the same story from another angle: 31.1 min against a local median of 41.6 min, 25% below it. Every measure here with a clear better direction points the same way, so Nassau County, NY is not trading one advantage for another, it reads stronger than its neighbours across the board. The counties themselves spread $70,901 on median household income, so Nassau County, NY sits at one end of an already wide local range rather than apart from it. Nassau County, NY has the highest median household income of the 6 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Nassau County, NY | 1,389,398 | $146,499 #1/6 | $605,757 #4/6 | 31.1 min #3/6 |
| Queens County, NY | 2,320,290 | $86,773 | $678,074 | 41.8 min |
| Bronx County, NY | 1,403,126 | $48,639 | $302,664 | 43.2 min |
| Kings County, NY | 2,630,245 | $80,565 | $977,210 | 41.6 min |
| New York County, NY | 1,628,057 | $105,051 | $1,358,349 | 30.9 min |
| Westchester County, NY | 998,212 | $119,541 | $482,100 | 30.6 min |
Frequently Asked Questions
Common questions about Nassau County, New York.
How big is Nassau County, New York by population?
About 1,389,398 people live in Nassau County, New York, in 457,924 households of 3.0 people on average. The median age is 43.1, so residents are older than the U.S. median of 37.3 by about 6 years.
How densely populated is Nassau County, New York?
Averaged over its land area, Nassau County, New York has 3,066 people per square mile, a density typical of a city. That is about 35 times the U.S. average of 86.
Is Nassau County, New York an affordable place to live?
The median home costs 4.1 times the median household income ($605,757 against $146,499), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $2,252 a month takes about 18% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
What share of adults in Nassau County, New York have a college degree?
45.7% of adults in Nassau County, New York hold a bachelor's degree or higher (about 1 in 2), well above the U.S. share of 31.6%.
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